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Related #13763
Background
Some developers may still use .net framework winform api to do designer work. But we have changed it into a new model. They may not aware of if. So they usually couldn't get what they want because they don't use new API.
So I think it might be a good idea to add an Analyzer to give it a prompt to recommend the user to use new API.
Note
This is not a refined PR. So please see if it is a good idea. If so, you can give me some advice and I will continue to work on it. If not,I will consider to close it. 🫤
Microsoft Reviewers: Open in CodeFlow